Nov 23, 2016 - 10:25 AM
My opinion is that baits such as Niban work just as well and do not have the risk of contamination as "dusting" would.
Just my opinion. I don't like dust all over my stuff in the attic, especially things I might use later.......
As far as when applied? Whenever the silverfish are active. In most areas unless it is in Alaska, the attic can heat up above freezing on a sunny day.